Air conditioning system

Abstract

To provide an air conditioning system suppressing inflow of outside air through a drain pipeline of a humidifier to keep air in a prescribed space clean when conveying temperature / humidity-conditioned air in an air conditioning room to a prescribed space.SOLUTION: An air conditioning system includes: an air-conditioning room constituted so as to introduce air from a living room; an air conditioner disposed in the air-conditioning room and conditioning the temperature of the air in the air-conditioning room; a humidification device 16 disposed in the air-conditioning room and humidifying the air the temperature of which is conditioned by the air conditioner; a conveying fan disposed in the air-conditioning room and conveying the temperature-conditioned and humidified air to the living room; and a drain pan 44 disposed to the bottom part of the humidification device 16. A drain pipeline 46 deriving drainage water from the humidification device 16 to the outside is connected to the drain pan 44. The drain pipeline 46 is provided with a water-seal part 47 suppressing the outside air from flowing into the air-conditioning room via the drain pipeline 46 when the air-conditioning room is decompressed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an air conditioning system for conditioning a plurality of spaces.

Background Art

[0002] Conventionally, whole-house air conditioning has been performed using a whole-house air conditioner for a dwelling. In addition, with the increasing demand for energy-saving houses and strengthened regulations, it is expected that the number of highly insulated and airtight houses will increase, and an air conditioning system suitable for such characteristics is desired.

[0003] As such an air conditioning system, an air conditioning system for the whole house is known in which air conveyed from a plurality of indoor spaces (living rooms, etc.) to an air conditioning room is air-conditioned to a predetermined temperature and humidity in the air conditioning room so that the temperature and humidity of the air in the plurality of indoor spaces etc. become the target temperature and humidity, and then conveyed to each of the plurality of indoor spaces etc. (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a conventional whole-house air conditioning system, air whose temperature and humidity have been adjusted in the air conditioning room is conveyed to each of a plurality of indoor spaces by a conveying fan installed in the air conditioning room. Then, since the air conditioning room becomes negative pressure as the air in the air conditioning room is conveyed, the air in the indoor space flows into the air conditioning room from the intake opening provided in the air conditioning room. The flowing-in air is adjusted in temperature and humidity in the air conditioning room. However, in addition to the intake opening, the drainage pipe of the humidifier communicates with the outside in the air conditioning room, and when the air conditioning room becomes negative pressure, there is a concern that external air (for example, dirty air with odor) may flow into the air conditioning room through the humidifier from such a drainage pipe.

[0006] The present invention has been made to solve the above problems, and when transporting air with adjusted temperature and humidity in an air-conditioned room to a predetermined space, it suppresses the inflow of external air from the drainage pipe of the humidifier and keeps the air in the predetermined space clean. An air conditioning system is provided.

Means for Solving the Problems

[0007] To achieve this object, the air conditioning system according to the present invention includes an air conditioning unit configured to be able to introduce air from a space to be air-conditioned, an air conditioner installed in the air conditioning unit to adjust the temperature of the air in the air conditioning unit, and an air conditioner installed in the air conditioning unit. A humidifying device that humidifies the air whose temperature is adjusted by the conditioner, a blower installed in the air conditioning unit that conveys the temperature-adjusted and humidified air to the space to be air-conditioned, and a water receiving portion provided at the bottom of the humidifying device. A drain pipe for draining the water from the humidifying device to the outside is connected to the water receiving portion. A water seal portion is installed in the drain pipe to suppress the inflow of external air into the air conditioning unit through the drain pipe when the pressure inside the air conditioning unit becomes reduced. This achieves the intended purpose.

Effects of the Invention

[0008] According to the present invention, when transporting air with adjusted temperature and humidity in an air-conditioned room to a predetermined space, it is possible to provide an air conditioning system that suppresses the inflow of external air from the drainage pipe of the humidifier and keeps the air in the predetermined space clean.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

DETAILED DESCRIPTION OF THE INVENTION

[0010] The air conditioning system according to the present invention includes an air conditioning unit configured to be able to introduce air from the conditioned space, an air conditioner installed in the air conditioning unit for temperature-adjusting the air of the air conditioning unit, a humidifying device installed in the air conditioning unit for humidifying the air temperature-adjusted by the air conditioner, a blower installed in the air conditioning unit for conveying the temperature-adjusted and humidified air to the conditioned space, and a water receiving part provided at the bottom of the humidifying device. a control unit for controlling the operation of the humidifying device; The water receiving part is connected to a drain pipe for leading the drain water from the humidifying device to the outside. A water sealing part is installed in the drain pipe to suppress the inflow of external air into the air conditioning unit through the drain pipe when the pressure inside the air conditioning unit becomes reduced. The control unit controls the humidifying device to periodically drain water, allowing water to flow through the drainage pipe and replacing the stored water stored in the water seal portion. The control unit identifies the cooling operation period or the heating operation period based on the operation mode of the air conditioner, and when identified as the cooling operation period, increases the replacement frequency of the stored water in the water seal portion compared to when identified as the heating operation period.

[0011] According to such a configuration, when the air conditioning system conveys the air with adjusted temperature and humidity in the air conditioning unit to the conditioned space, the air sealing part suppresses the inflow of external air (for example, odorous and dirty air) from the drain pipe of the humidifying device into the air conditioning unit, so that the air in the conditioned space can be kept clean.

[0012] Further, the air conditioning system according to the present invention further includes a control unit that controls the operation of the humidifying device. The control unit preferably controls to pass water through the water sealing part by periodically discharging the water from the humidifying device, and to replace the stored water stored in the water sealing part. Thereby, the growth of mold or bacteria due to the deterioration of the quality of the stored water stored in the water sealing part is suppressed. As a result, when the inside of the air conditioning unit becomes negative pressure, the inflow of mold or bacteria in the stored water of the water sealing part into the air conditioning unit is suppressed. That is, the air conditioning system can keep the air in the air-conditioned space clean.

[0013] Further, in the air conditioning system according to the present invention, the control unit determines whether it is a cooling operation period or a heating operation period based on the operation mode of the air conditioner. When it is specified as the cooling operation period, it is preferable to increase the replacement frequency of the stored water in the water sealing part compared to when it is specified as the heating operation period. Thereby, in the cooling operation period in which the quality deterioration of the stored water stored in the water sealing part is likely to occur, the growth of mold or bacteria can be more reliably suppressed. That is, the air conditioning system can more effectively suppress the deterioration of the quality of the stored water in the water sealing part (maintain the sanitary state of the water sealing part) based on the operation mode of the air conditioner.

[0014] Further, in the air conditioning system according to the present invention, the drainage from the humidifying device is preferably electrolyzed water. Thereby, since the stored water stored in the water sealing part becomes electrolyzed water, the growth of mold or bacteria in the stored water is more reliably suppressed by the electrolyzed hypochlorous acid contained in the electrolyzed water. That is, the air conditioning system can more effectively suppress the deterioration of the quality of the stored water in the water sealing part by the electrolyzed water used by the humidifying device.

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are an example of embodying the present invention and do not limit the technical scope of the present invention. In addition, each drawing described in the embodiment is a schematic drawing, and the ratio of the size and thickness of each component in each drawing does not necessarily reflect the actual dimensional ratio.

[0016] (Embodiment 1) First, with reference to FIG. 1, the air conditioning system 20 according to Embodiment 1 of the present invention will be described. FIG. 1 is a schematic connection diagram of the air conditioning system 20 according to Embodiment 1 of the present invention.

[0017] The air conditioning system 20 includes a plurality of conveying fans 3 (conveying fans 3a, 3b), a heat exchange fan 4, a plurality of dampers 5 (dampers 5a, 5b), a plurality of circulation ports 6 (circulation ports 6a, 6b, 6c, 6d), a plurality of room exhaust ports 7 (room exhaust ports 7a, 7b, 7c, 7d), a plurality of room supply ports 8 (room supply ports 8a, 8b, 8c, 8d), room temperature sensors 11 (room temperature sensors 11a, 11b, 11c, 11d), room humidity sensors 12 (room humidity sensors 12a, 12b, 12c, 12d), an air conditioner (air conditioner) 13, a humidifying device 16, a dust collecting filter 17, an input / output terminal 19, and a system controller 14 (corresponding to an air conditioning system controller).

[0018] The air conditioning system 20 is installed in a general house 1 which is an example of a building. The general house 1 has a plurality (four in this embodiment) of rooms 2 (rooms 2a, 2b, 2c, 2d) and at least one air-conditioned room 18 independent of the rooms 2. Here, the general house 1 (residence) is a dwelling provided as a place for residents to conduct private lives. As a general configuration, the rooms 2 include a living room, a dining room, a bedroom, a private room, a children's room, etc. Also, the rooms provided by the air conditioning system 20 may include a toilet, a bathroom, a washroom, a dressing room, etc. Note that the room 2 corresponds to the "air-conditioned space" in the claims.

[0019] The living room 2a is equipped with a circulation port 6a, a living room exhaust port 7a, a living room air supply port 8a, a living room temperature sensor 11a, a living room humidity sensor 12a, a system controller 14, and an input / output terminal 19. Also, the living room 2b is equipped with a circulation port 6b, a living room exhaust port 7b, a living room air supply port 8b, a living room temperature sensor 11b, and a living room humidity sensor 12b. Also, the living room 2c is equipped with a circulation port 6c, a living room exhaust port 7c, a living room air supply port 8c, a living room temperature sensor 11c, and a living room humidity sensor 12c. Also, the living room 2d is equipped with a circulation port 6d, a living room exhaust port 7d, a living room air supply port 8d, a living room temperature sensor 11d, and a living room humidity sensor 12d.

[0020] On the other hand, the air-conditioning room 18 is equipped with a conveying fan 3a, a conveying fan 3b, a damper 5a, a damper 5b, an air conditioner 13, a dust collection filter 17, and a humidifying device 16. More specifically, from the upstream side of the air flow path flowing through the air-conditioning room 18, the air conditioner 13, the dust collection filter 17, the humidifying device 16, the conveying fan 3 (conveying fans 3a, 3b), and the damper 5 (dampers 5a, 5b) are arranged in this order.

[0021] In the air-conditioning room 18, the air (indoor air) conveyed from each living room 2 through the circulation port 6 and the outside air (outdoor air) taken in and heat-exchanged by the heat exchange fan 4 are mixed. The air in the air-conditioning room 18 has its temperature and humidity controlled respectively by the air conditioner 13 and the humidifying device 16 provided in the air-conditioning room 18, that is, it is air-conditioned, and the air to be conveyed to the living room 2 is generated. The air air-conditioned in the air-conditioning room 18 is conveyed to each living room 2 by the conveying fan 3. Here, the air-conditioning room 18 means a space with a certain size where the air conditioner 13, the humidifying device 16, the dust collection filter 17, etc. can be arranged and the air-conditioning of each living room 2 can be controlled, but it does not intend to be a living space and basically does not mean a room where the occupants stay. Note that the air-conditioning room 18 corresponds to the "air-conditioning unit" in the claims.

[0022] The air in each living room 2 is conveyed to the air-conditioning room 18 through the circulation port 6. In addition, after being heat-exchanged through the heat-exchange air fan 4 by the living room exhaust port 7, it is discharged outdoors. The air-conditioning system 20 performs ventilation of the first type of ventilation method by discharging the indoor air (indoor air) from each living room 2 by the heat-exchange air fan 4 and taking in the outdoor air (outdoor air) indoors. The ventilation air volume of the heat-exchange air fan 4 is configured to be settable in multiple stages, and the ventilation air volume is set to meet the required ventilation volume specified by laws and regulations.

[0023] The heat-exchange air fan 4 is configured to have an air supply fan (not shown) and an exhaust fan (not shown) inside, and by operating each fan, it ventilates while performing heat exchange between the indoor air (indoor air) and the outdoor air (outdoor air). At this time, the heat-exchange air fan 4 conveys the heat-exchanged outdoor air to the air-conditioning room 18.

[0024] The conveying fan 3 is provided on the wall surface (the wall surface on the bottom surface side) of the air-conditioning room 18. Then, the air in the air-conditioning room 18 is conveyed from the conveying fan 3 to the living room 2 through the conveying duct from the living room air supply port 8. More specifically, the air in the air-conditioning room 18 is conveyed to the living rooms 2a and 2b located on the first floor of the general house 1 by the conveying fan 3a, respectively, and is conveyed to the living rooms 2c and 2d located on the second floor of the general house 1 by the conveying fan 3b, respectively. Note that the conveying ducts connected to the living room air supply port 8 of each living room 2 are provided independently. In addition, the conveying fan 3 corresponds to the "air blower" in the claims.

[0025] When the damper 5 conveys air from the conveying fan 3 to each living room 2, the air volume supplied to each living room 2 is adjusted by adjusting the opening degree of the damper 5. More specifically, the damper 5a adjusts the air volume supplied to the living rooms 2a and 2b located on the first floor, and the damper 5b adjusts the air volume supplied to the living rooms 2c and 2d located on the second floor.

[0026] A part of the air in each living room 2 (living rooms 2a to 2d) is conveyed to the air-conditioning room 18 through a circulation duct by the corresponding circulation opening 6 (circulation openings 6a to 6d). Here, the air conveyed by the circulation opening 6 is naturally conveyed to the air-conditioning room 18 as circulation air by only the difference between the air volume (supply air volume) conveyed from the air-conditioning room 18 to each living room 2 by the conveying fan 3 and the air volume (exhaust air volume) exhausted from the living room exhaust opening 7 to the outside by the heat exchange air fan 4. Note that the circulation ducts connecting the air-conditioning room 18 and each living room 2 may be provided independently, but a plurality of branch ducts, which are part of the circulation ducts, may be merged from the middle and integrated into one circulation duct, and then connected to the air-conditioning room 18.

[0027] As described above, each circulation opening 6 (circulation openings 6a to 6d) is an opening for conveying indoor air from each living room 2 (living rooms 2a to 2d) to the air-conditioning room 18.

[0028] As described above, each living room exhaust opening 7 (living room exhaust openings 7a to 7d) is an opening for conveying indoor air from each living room 2 (living rooms 2a to 2d) to the heat exchange air fan 4.

[0029] As described above, each living room supply opening 8 (living room supply openings 8a to 8d) is an opening for conveying the air in the air-conditioning room 18 from the air-conditioning room 18 to each living room 2 (living rooms 2a to 2d).

[0030] The living room temperature sensor 11 (living room temperature sensors 11a to 11d) is a sensor that acquires the living room temperature (indoor temperature) of the corresponding living room 2 (living rooms 2a to 2d) and transmits it to the system controller 14.

[0031] The living room humidity sensor 12 (living room humidity sensors 12a to 12d) is a sensor that acquires the living room humidity (indoor humidity) of the corresponding living room 2 (living rooms 2a to 2d) and transmits it to the system controller 14.

[0032] The air conditioner 13 corresponds to an air conditioner and controls the air conditioning of the air-conditioned room 18. The air conditioner 13 cools or heats the air in the air-conditioned room 18 so that the temperature of the air in the air-conditioned room 18 becomes the set temperature (the target temperature of the air-conditioned room). Here, the set temperature is set to a temperature based on the result of calculating the necessary heat quantity from the temperature difference between the target temperature (the target temperature of the living room) set by the user and the living room temperature.

[0033] The humidifying device 16 is located on the downstream side of the air conditioner 13 in the air-conditioned room 18. When the humidity of the air in each living room 2 (the humidity of the living room) is lower than the target humidity (the target humidity of the living room) set by the user, the humidifying device 16 humidifies the air in the air-conditioned room 18 so that the humidity becomes the target humidity. Also, the humidity dealt with here is indicated by relative humidity respectively, but it may be dealt with as absolute humidity by a predetermined conversion process. In this case, it is preferable to deal with the entire handling in the air conditioning system 20 including the humidity of the living room 2 as absolute humidity.

[0034] The dust collecting filter 17 is a dust collecting filter that collects particles floating in the air introduced into the air-conditioned room 18. The dust collecting filter 17 collects the particles contained in the air conveyed into the air-conditioned room 18 through the circulation port 6, thereby making the air supplied indoors by the conveying fan 3 clean air.

[0035] The system controller 14 is a controller that controls the entire air conditioning system 20. The system controller 14 is communicably connected to each of the heat exchange fan 4, the conveying fan 3, the damper 5, the living room temperature sensor 11, the living room humidity sensor 12, the air conditioner 13, and the humidifying device 16 by wireless communication. Note that the system controller 14 corresponds to the "control unit" in the claims.

[0036] In addition, the system controller 14 controls the air conditioner 13 as an air conditioner, the humidifying device 16, the air volume of the transport fan 3, and the opening degree of the damper 5 according to the room temperature and room humidity of each room 2 acquired by the room temperature sensor 11 and the room humidity sensor 12, and the target temperature (room target temperature) and target humidity (room target humidity) set for each of the rooms 2a to 2d. Note that the air volume of the transport fan 3 may be individually controlled for each fan.

[0037] Thereby, the air conditioned in the air-conditioned room 18 is transported to each room 2 at the air volume set for each transport fan 3 and each damper 5. Therefore, the room temperature and room humidity of each room 2 are controlled to be the target temperature (room target temperature) and target humidity (room target humidity).

[0038] Here, the system controller 14 is wirelessly connected to the heat exchange fan 4, the transport fan 3, the damper 5, the room temperature sensor 11, the room humidity sensor 12, the air conditioner 13, and the humidifying device 16. Thereby, complicated wiring work can be made unnecessary. However, all of these, or a part of these and the system controller 14, may be configured to be communicable by wired communication.

[0039] The input / output terminal 19 is communicably connected to the system controller 14 by wireless communication. The input / output terminal 19 receives the input of information necessary for constructing the air conditioning system 20 and stores it in the system controller 14, or acquires and displays the state of the air conditioning system 20 from the system controller 14. Examples of the input / output terminal 19 include portable information terminals such as mobile phones, smartphones, or tablets.

[0040] Note that the input / output terminal 19 does not necessarily have to be connected to the system controller 14 by wireless communication, and may be connected to the system controller 14 so as to be communicable by wired communication. In this case, the input / output terminal 19 may be realized by, for example, a wall-mounted remote controller.

[0041] Next, with reference to FIGS. 2 and 3, the configuration of the humidifying device 16 will be described. FIG. 2 is a schematic cross-sectional view of the humidifying device 16 that constitutes the air conditioning system 20. FIG. 3 is an enlarged cross-sectional view of the components related to drainage in the humidifying device 16.

[0042] The humidifying device 16 is located downstream of the air conditioner 13 in the air conditioning chamber 18 and is a device for humidifying the air in the air conditioning chamber 18 by centrifugal water atomization. As shown in FIG. 2, the humidifying device 16 includes a suction port 31 for sucking air in the air conditioning chamber 18, a blowout port 32 for blowing the humidified air into the air conditioning chamber 18, an air passage provided between the suction port 31 and the blowout port 32, and a liquid atomization chamber 33 provided in this air passage.

[0043] The suction port 31 is provided on the upper surface of the housing that constitutes the outer frame of the humidifying device 16 (the upper surface on the central side of the housing), and the blowout port 32 is provided on the upper surface of the housing (the upper surface on the outer edge side of the housing). The liquid atomization chamber 33 is the main part of the humidifying device 16 and is where water is atomized by the centrifugal water atomization method.

[0044] Specifically, the humidifying device 16 includes a rotary motor 34, a rotating shaft 35 rotated by the rotary motor 34, a centrifugal fan 36, a cylindrical lift pipe 37, a water storage section 40, a first eliminator 41, a second eliminator 42, a filter 43, and a drain pan 44.

[0045] The lift pipe 37 is fixed to the rotating shaft 35 inside the liquid atomization chamber 33 and pumps water from a circular lift port provided vertically downward while rotating in accordance with the rotation of the rotating shaft 35. More specifically, the lift pipe 37 has an inverted conical hollow structure, has a circular lift port vertically downward, and the rotating shaft 35 arranged vertically is fixed at the center of the top surface of the inverted cone above the lift pipe 37. By connecting the rotating shaft 35 to the rotary motor 34 located vertically above the liquid atomization chamber 33, the rotational motion of the rotary motor 34 is conducted to the lift pipe 37 through the rotating shaft 35, and the lift pipe 37 rotates.

[0046] The lift pipe 37 is provided with a plurality of rotating plates 38 formed so as to project outward from the outer surface of the lift pipe 37 on the top surface side of an inverted conical shape. The plurality of rotating plates 38 are formed so as to project outward from the outer surface of the lift pipe 37 with a predetermined interval in the axial direction of the rotating shaft 35 provided between the rotating plates 38 adjacent to each other vertically. Since the rotating plate 38 rotates together with the lift pipe 37, a horizontal disk shape coaxial with the rotating shaft 35 is preferable. Note that the number of the rotating plates 38 is appropriately set according to the target performance or the dimensions of the lift pipe 37.

[0047] In addition, a plurality of openings 39 penetrating the wall surface of the lift pipe 37 are provided in the wall surface of the lift pipe 37. Each of the plurality of openings 39 is provided at a position communicating the inside of the lift pipe 37 with the upper surface of the rotating plate 38 formed so as to project outward from the outer surface of the lift pipe 37.

[0048] The centrifugal fan 36 is arranged vertically above the lift pipe 37 and is a fan for taking air from the air-conditioning chamber 18 into the apparatus. The centrifugal fan 36 is fixed to the rotating shaft 35 in the same manner as the lift pipe 37, and by rotating in accordance with the rotation of the rotating shaft 35, air is introduced into the liquid atomization chamber 33.

[0049] The water storage section 40 stores the water pumped by the lift pipe 37 from the water intake port in the vertically downward direction of the lift pipe 37. The depth of the water storage section 40 is designed such that a part of the lower part of the lift pipe 37, for example, a length of about one-third to one percent of the conical height of the lift pipe 37 is immersed. This depth can be designed according to the required pumping volume. Also, the bottom surface of the water storage section 40 is formed in a mortar shape facing the water intake port. The supply of water to the water storage section 40 is carried out by a water supply section (not shown). The drainage from the water storage section 40 is carried out from a drain port 40a provided vertically below the rotary shaft 35. And the drainage flowing out from the drain port 40a is collected by a drain pan 44 provided on the entire bottom surface of the humidifying device 16. The first eliminator 41 is a porous body through which air can flow, and is provided on the side (outer peripheral part in the centrifugal direction) of the liquid atomization chamber 33, and is arranged such that air flows in the centrifugal direction. In the first eliminator 41, the water droplets discharged from the opening 39 of the lift pipe 37 collide, thereby atomizing the water droplets and collecting the water droplets among the water contained in the air passing through the liquid atomization chamber 33. As a result, only the vaporized water is contained in the air flowing through the humidifying device 16.

[0050] The second eliminator 42 is provided on the downstream side of the first eliminator 41 and is arranged such that air flows vertically upward. The second eliminator 42 is also a porous body through which air can flow, and by the air passing through the first eliminator 41 colliding, the water droplets among the water contained in the air passing through the second eliminator 42 are collected. As a result, by doubly collecting the atomized water droplets by the two eliminators, water droplets with a larger particle size can be collected more accurately.

[0051] The filter 43 is provided on the downstream side of the second eliminator 42 and is arranged such that air flows vertically upward. The filter 43 has a role of collecting the scattered fine scale components when the fine scale components accumulated in the liquid atomization chamber 33 are scattered due to long-term use.

[0052] The drain pan 44 is provided on the entire bottom surface of the humidifying device 16 including the lower region of the water storage part 40, and has a role of collecting the drained water flowing down from the water storage part 40. Further, when an abnormality occurs in the humidifying device 16, for example, when a water leak occurs in the water supply pipe to the humidifying device 16 or when a drainage failure such as a clogging occurs in the drainage pipe 46 described later, the drain pan 44 also has a role of temporarily holding the leaked water or the water that could not be drained to the outside, and preventing water leakage from the humidifying device 16 into the air conditioning room 18. A drainage pipe 46 for leading the collected drained water to the outside is connected to the drain pan 44. The drain pan 44 may be integrally formed with the drainage pipe 46, or may be configured by connecting individual members. Note that the drain pan 44 corresponds to the "water receiving part" in the claims.

[0053] The drainage pipe 46 is a member for leading the drained water collected by the drain pan 44 to the outside (outside the air conditioning room 18). One end of the drainage pipe 46 is connected to the bottom surface of the drain pan 44, and the other end, the external drain port 45, is connected to an external facility drain pipe (not shown). Here, one end of the drainage pipe 46 is configured as a recess (groove) formed on the bottom surface of the drain pan 44. More specifically, as shown in FIG. 3, the recess (groove) extends from a position directly below the drain port 40a of the water storage part 40 in the drain pan 44 to the outer edge position. Further, in the recess (groove), a downward gradient is provided from a position directly below the drain port 40a toward the outer edge position in order to smoothly conduct the drained water collected by the drain pan 44 to the external drain port 45. A water sealing part 47 is installed at a portion of the outer edge of the drain pan 44 near the external drain port 45 in the drainage pipe 46.

[0054] The water sealing part 47 is a member that has a role of suppressing the inflow of external air (for example, smelly and dirty air) into the humidifying device 16 (finally the air conditioning room 18) through the drainage pipe 46 when the inside of the air conditioning room 18 is depressurized by the blowing operation of the conveying fan 3. The water sealing part 47 also has a role of suppressing the outflow of the air whose temperature and humidity have been adjusted in the air conditioning room 18 to the outside through the drainage pipe 46. That is, the water sealing part 47 can be said to be a drainage trap in the drainage pipe 46.

[0055] More specifically, the water seal portion 47 is composed of a housing 47a, a storage portion 47b, a partition plate 47c, and stored water 48 that serves as a water seal.

[0056] The housing 47a forms the outer frame of the water seal portion 47. An upstream opening through which drainage from the drain pan 44 flows in is provided on one side surface of the housing 47a, and a downstream opening through which drainage flows out toward the external drain port 45 is provided on the other side surface of the housing 47a. And a drainage pipe 46 is connected to each opening.

[0057] The storage portion 47b stores the stored water 48 that serves as a water seal at the bottom of the housing 47a.

[0058] The partition plate 47c extends from the upper part to the bottom of the housing 47a and is provided so that the tip of the partition plate 47c reaches into the stored water 48. That is, the partition plate 47c divides the space above the water surface of the stored water 48 into an upstream side and a downstream side, and forms a flow path through which drainage flows inside the stored water 48.

[0059] As described above, in the water seal portion 47, the flow path formed inside becomes U-shaped by the partition plate 47c, and when the storage portion 47b is filled with the stored water 48, the U-shaped flow path is sealed to prevent the passage of air.

[0060] Next, with reference to FIG. 2, the operation principle of humidification (atomization of water) in the humidifying device 16 will be described. In FIG. 2, the flow of air and the flow of water inside the humidifying device 16 are respectively indicated by arrows.

[0061] First, when the operation of the humidifying device 16 is started, the rotary shaft 35 is rotated at the first rotational speed R1 by the rotary motor 34, and the centrifugal fan 36 starts sucking the air in the air conditioning chamber 18 from the suction port 31. Then, the lift pipe 37 rotates in accordance with the rotation of the rotary shaft 35 at the first rotational speed R1. And, like the flow of water indicated by the dashed arrow, the water stored in the water storage part 40 is pumped up by the lift pipe 37 due to the centrifugal force generated by the rotation. Here, the first rotational speed R1 of the rotary motor 11 (lift pipe 37) is set between 2000 rpm and 5000 rpm, for example, according to the air flow rate and the humidification amount to the air. Since the lift pipe 37 has an inverted conical hollow structure, the water pumped up by the rotation is lifted upward along the inner wall of the lift pipe 37. And, the lifted water is discharged in the centrifugal direction through the rotary plate 38 from the opening 39 of the lift pipe 37 and scattered as water droplets.

[0062] The water droplets scattered from the rotary plate 38 fly through the space (liquid atomization chamber 33) surrounded by the first eliminator 41, collide with the first eliminator 41, and are atomized. On the other hand, the air passing through the liquid atomization chamber 33 moves to the outer peripheral part of the first eliminator 41 while containing the water atomized (refined) by the first eliminator 41, like the air flow indicated by the solid arrow. And, in the process where the air flows in the air passage from the first eliminator 41 to the second eliminator 42, a vortex of the air flow is generated and the water and the air are mixed. And, the air containing water passes through the second eliminator 42 and the filter 43. Thereby, the humidifying device 16 can humidify the air sucked from the suction port 31 and blow out the humidified air from the blowout port 32.

[0063] Subsequently, with reference to FIG. 2, the water shut-off operation and the drainage operation of the water storage part 40 in the humidifying device 16 will be described.

[0064] In the humidifying device 16, the lift pipe 37 is arranged at a predetermined position directly above the drain port 40a of the water storage section 40. When the humidifying operation is started in the humidifying device 16 and the rotary motor 34 (lift pipe 37) rotates at the third rotational speed R3 (for example, 2000 rpm), a vortex (not shown) is generated in the water of the water storage section 40 inside the lift pipe 37 due to the centrifugal force of the rotation. Then, the lift pipe 37 forms a gap (not shown) that communicates between the tip opening of the lift pipe 37 and the drain port 40a at the center of the vortex generated by the rotation. As a result, the gap closes the drain port 40a, suppressing the water in the water storage section 40 from flowing into the drain port 40a. That is, in the humidifying device 16, it is possible to suppress the water in the water storage section 40 from being drained from the drain port 40a during the humidifying operation (while the rotary motor 34 is rotating at the second rotational speed R2).

[0065] On the other hand, when the rotation of the rotary motor 34 (lift pipe 37) stops, the gap disappears along with the vortex, and the water in the water storage section 40 flows into the drain port 40a. That is, in the humidifying device 16, by stopping the humidifying operation (the rotation operation of the rotary motor 34), the water in the water storage section 40 can be drained from the drain port 40a and made to flow into the drain pan 44.

[0066] In this way, the humidifying device 16 can suppress (stop the water flow) the water in the water storage section 40 from being drained from the drain port 40a during the humidifying operation without using a drain valve at the drain port 40a, and after the humidifying operation is stopped, the water in the water storage section 40 can be drained from the drain port 40a to the drain pan 44.

[0067] Next, with reference to FIG. 4, each function of the system controller 14 will be described. FIG. 4 is a schematic functional block diagram of the system controller 14 of the air conditioning system 20.

[0068] As shown in FIG. 4, the system controller 14 includes a room target temperature and humidity acquisition unit 51, an air conditioning control unit 52, an air conditioner control unit 53, a rotary motor control unit 54, an air volume control unit 55, and a storage unit 56.

[0069] The room target temperature and humidity acquisition unit 51 acquires the room target temperature and the room target humidity (hereinafter also referred to as the room target temperature and humidity) that are commonly set for the entire room 2 by the input / output terminal 19. The room target temperature is set as a predetermined temperature range defined with the lower limit being the minimum temperature and the upper limit being the maximum temperature. The room target humidity is set as a predetermined humidity range defined with the lower limit being the minimum humidity and the upper limit being the maximum humidity. Here, a temperature equal to or higher than the room target temperature means a temperature equal to or higher than the upper limit maximum temperature, and a temperature lower than the room target temperature means a temperature lower than the lower limit minimum temperature. The same applies to the room target humidity. In this embodiment, the user can set the room target temperature and the room target humidity, but they may be set as fixed values in the air conditioning system 20 in advance. The maximum temperature and the minimum temperature acquired by the room target temperature and humidity acquisition unit 51 or set in advance, and the maximum humidity and the minimum humidity are stored in the storage unit 56.

[0070] The air conditioning control unit 52 includes a temperature and humidity difference calculation unit 57 and a control condition determination unit 58.

[0071] The temperature and humidity difference calculation unit 57 calculates, for each room 2, the difference (temperature difference) between the room target temperature acquired by the room target temperature and humidity acquisition unit 51 or set in advance and the room temperature acquired by the room temperature sensor 11, and the difference (humidity difference) between the room target humidity acquired by the room target temperature and humidity acquisition unit 51 or set in advance and the room humidity acquired by the room humidity sensor 12.

[0072] Based on the temperature difference and the humidity difference calculated for each room 2 by the temperature and humidity difference calculation unit 57, the control condition determination unit 58 determines the control conditions for the air conditioner 13, the humidifying device 16, the conveying fan 3, and the damper 5.

[0073] That is, the air-conditioning control unit 52 determines the outputs of the air conditioner 13, the humidifying device 16, the conveying fan 3, and the damper 5 based on the information on the target room temperature and humidity from the room target temperature and humidity acquisition unit 51 and the information on the temperature difference and humidity difference obtained from the information on the room temperature and humidity from each sensor (room temperature sensor 11, room humidity sensor 12).

[0074] In addition, the air-conditioning control unit 52 automatically switches the operation mode from heating operation to cooling operation or from cooling operation to heating operation based on the switching date between the heating operation and the cooling operation in the air conditioner 13 set when the air-conditioning system 20 is installed. Note that the set switching date is determined according to the climate conditions of the area where the air-conditioning system 20 is installed and is stored in the storage unit 56.

[0075] In addition, the air-conditioning control unit 52 controls the replacement operation of the stored water 48 in the water sealing unit 47. Although details will be described later, the air-conditioning control unit 52 determines the output of the humidifying device 16 based on the information (operation mode information) on the operation mode of the air conditioner 13.

[0076] The air-conditioning control unit 53 controls the operation mode, the blowing temperature, and the air volume of the air conditioner 13 in the air-conditioning chamber 18 based on the control method determined by the air-conditioning control unit 52.

[0077] The rotation motor control unit 54 controls the rotation speed of the rotation motor 34 provided in the humidifying device 16, thereby controlling the humidification amount of the humidifying device 16 provided in the air-conditioning chamber 18 based on the control conditions determined by the air-conditioning control unit 52.

[0078] The air volume control unit 55 controls the air volume of the conveying fan 3 and the opening degree of the damper 5 provided corresponding to the living room 2 based on the control conditions determined by the air-conditioning control unit 52.

[0079] The memory unit 56 is a so-called memory that stores the temperature range, i.e., the maximum temperature and the minimum temperature, and the humidity range, i.e., the maximum humidity and the minimum humidity, which are obtained by the living room target temperature and humidity acquisition unit 51 or preset in advance. Also, the memory unit 56 is used when the system controller 14 needs to store information such as numerical values for other controls.

[0080] Next, with reference to FIG. 5, the air conditioning process executed by the system controller 14 will be described. FIG. 5 is a flowchart showing the air conditioning process procedure. Here, assuming the air conditioning process in winter in Japan, in the air conditioning system 20, the air conditioner 13 raises the temperature of the air in the living room 2 while performing humidification by the humidifying device 16.

[0081] As shown in FIG. 5, in the air conditioning system 20, like a general whole-house air conditioning system, the heat exchange fan 4 is always in ventilation operation. Even when no air conditioning process is being performed, the transport fan 3 is set to the second air volume, and the damper 5 is set to the second opening degree for air supply (step S11). Here, the second air volume is the air volume that satisfies the required ventilation volume defined by law in a house, and the air supplied into the air conditioning chamber 18 by the heat exchange fan 4 is transported to the living room 2 by the transport fan 3. Also, the second opening degree is set to, for example, fully open. When only the heat exchange fan 4 is operating, the air conditioner 13 and the humidifying device 16 are stopped.

[0082] When the user executes the air conditioning process, first, the system controller 14 acquires the living room target temperature and humidity (the living room target temperature and the living room target humidity) set at the input / output terminal 19 and stores them in the memory unit 56 (step S12). Here, the living room target temperature and humidity are the temperature and humidity that the user feels comfortable, and they are the temperature and humidity common to all living rooms.

[0083] When the target room temperature and humidity are acquired, the air-conditioning control unit 52 acquires information on the room temperature and humidity from the room temperature sensor 11 and the room humidity sensor 12 installed in each room 2 (step S13). Subsequently, the air-conditioning control unit 52 uses the temperature and humidity difference calculation unit 57 to calculate the temperature difference and humidity difference relative to the target from the acquired information on the target room temperature and humidity and the information on the room temperature and humidity, respectively (step S14).

[0084] Then, the control condition determination unit 58 specifies the target air-conditioning room temperature and humidity (the target air-conditioning room temperature and the target air-conditioning room humidity) for the air in the air-conditioning room 18 based on the calculated temperature difference and humidity difference (step S15). Here, the target air-conditioning room temperature is set to a first temperature that is higher than the target room temperature, and the target air-conditioning room humidity is set to a first humidity that is higher than the target room humidity.

[0085] Then, the air-conditioning control unit 52 determines the control conditions for the air conditioner 13, the humidifying device 16, the conveying fan 3, and the damper 5 based on the specified target air-conditioning room temperature and humidity, and causes them to be executed respectively (step S16).

[0086] Specifically, the air conditioner control unit 53 starts the operation of the air conditioner 13 based on the control conditions from the air-conditioning control unit 52, and performs temperature control so that the temperature of the air in the air-conditioning room 18 becomes the target air-conditioning room temperature (the first temperature). The rotation motor control unit 54 starts the rotation operation of the rotation motor 34 based on the control conditions from the air-conditioning control unit 52, and rotates it at a first rotation speed R1 (2000 rpm to 5000 rpm) so that the humidity of the air in the air-conditioning room 18 becomes the target air-conditioning room humidity (the first humidity). The air volume control unit 55 changes the air volume of the conveying fan 3 and the opening degree of the damper 5 to the first air volume and the first opening degree respectively based on the control conditions from the air-conditioning control unit 52. The first opening degree is set according to the temperature difference between the temperature of the air in the room 2 and the target room temperature. For example, if the temperature difference is large, it is set to widen, and if the temperature difference is small, it is set to narrow.

[0087] During air conditioning operation, when a predetermined time T has elapsed since the control condition was changed (here, step S16) (Yes in step S17), the air conditioning control unit 52 newly acquires information on the room temperature and humidity from the room temperature sensor 11 and the room humidity sensor 12 installed in each room 2 (returns to step S13). On the other hand, when the predetermined time T has not elapsed (No in step S17), the air conditioning control unit 52 continues the air conditioning operation under the same control conditions (returns to step S17). Here, the predetermined time T is the acquisition cycle time of the room temperature and humidity in the room temperature sensor 11 and the room humidity sensor 12, and is set to, for example, 5 minutes.

[0088] In the air conditioning system 20 according to the present embodiment, through the above series of processes, the room temperature and humidity in the room 2 are controlled so as to reach the room target temperature and humidity.

[0089] Next, with reference to FIGS. 6 and 7, the replacement control of the stored water 48 in the water sealing portion 47 will be described. FIG. 6 is a control flowchart for specifying the replacement frequency in the replacement control of the stored water 48 in the water sealing portion 47. FIG. 7 is a replacement control flowchart of the stored water 48 in the water sealing portion 47.

[0090] First, when performing the replacement control of the stored water 48 in the water sealing portion 47, the air conditioning control unit 52 specifies the replacement interval of the stored water 48. Specifically, as shown in FIG. 6, the air conditioning control unit 52 acquires information on the operation mode of the air conditioner 13 (operation mode information) from the air conditioner 13 (step S21). The operation mode information includes information on the period during which the air conditioner 13 performs the cooling operation (cooling operation period) and the period during which the air conditioner 13 performs the heating operation (heating operation period), as well as information on the switching date for switching each period.

[0091] The air-conditioning control unit 52 determines whether the air conditioner 13 is in the cooling operation period based on the acquired operation mode information (step S22). As a result of the determination, if it is specified that the air conditioner 13 is in the cooling operation period (Yes in step S22), the stored water replacement timer Tc is set to the first time (step S23), and the process proceeds to the stored water replacement process. On the other hand, as a result of the determination in step S22, if the air conditioner 13 is not in the cooling operation period, that is, if it is specified that the air conditioner 13 is in the heating operation period (No in step S22), the stored water replacement timer Tc is set to the second time, which is longer than the first time (step S24), and the process proceeds to the stored water replacement process.

[0092] Here, the first time in the cooling operation period is set to, for example, 12 hours, and the second time in the heating operation period is set to, for example, 24 hours. That is, in the cooling operation period, the stored water replacement timer Tc is set smaller than in the heating operation period, and the stored water 48 is replaced more frequently. In other words, when the air conditioner 13 is specified to be in the cooling operation period in the air-conditioning control unit 52, the replacement frequency of the stored water 48 in the water sealing part 47 is increased compared to when the air conditioner 13 is specified to be in the heating operation period.

[0093] Subsequently, the stored water replacement process will be described.

[0094] As shown in FIG. 7, the air-conditioning control unit 52 can count down the stored water replacement timer Tc, and repeats the countdown until the stored water replacement timer Tc reaches "0" (step S31). Then, when the stored water replacement timer Tc reaches "0", the stored water replacement process is started. Specifically, when the first time (12 hours) set in the cooling operation period or the second time (24 hours) set in the heating operation period has elapsed, the stored water replacement process is started.

[0095] When the stored water replacement process starts, the air conditioning control unit 52 determines whether the humidifying device 16 is performing a humidifying operation (step S32). As a result of the determination, if the humidifying device 16 is performing a humidifying operation (Yes in step S32), the humidifying operation of the humidifying device 16 is stopped (step S33). Thereby, since the water stopping operation of the humidifying device 16 stops, the water stored in the water storage unit 40 of the humidifying device 16 is drained from the drain port 40a. Then, after waiting for the elapse of a drainage predetermined time Tout (for example, 1 minute) since the start of drainage, that is, after waiting for all the water stored in the water storage unit 40 to be drained (step S34), the stored water replacement process is terminated. As a result, the drainage from the water storage unit 40 flows through the drain pan 44, the drainage pipe 46, and the water sealing unit 47 and is led to the outside from the external drain port 45. At this time, the stored water 48 stored in the water sealing unit 47 is replaced with the drained water that has flowed through, and the replaced new stored water 48 is stored in the water sealing unit 47. That is, even if the quality of the stored water 48 has deteriorated and mold or bacteria have propagated, the stored water 48 in which mold or bacteria have propagated is led to the outside together with the drainage. As a result, deterioration of the quality of the stored water 48 in the water sealing unit 47 is suppressed.

[0096] On the other hand, as a result of the determination in step S32, if the humidifying device 16 is not performing a humidifying operation (No in step S32), the supply of water to the water storage unit 40 of the humidifying device 16 is started (step S35). Then, after waiting for the elapse of a water supply predetermined time Tin (for example, 2 minutes) since the start of water supply (step S36), the water supply is terminated (step S37). Here, the water supply predetermined time Tin is set to a time during which a water volume sufficiently larger than the volume of the storage unit 47b flows so that the stored water 48 in the water sealing unit 47 is completely replaced. While the water supply to the water storage unit 40 is being performed in step S36, the water stopping operation of the humidifying device 16 is stopped, that is, the lift pipe 37 is not rotating. Therefore, the water supplied to the water storage unit 40 is directly drained from the drain port 40a. Thereafter, when the drainage from the water storage unit 40 flows through the drain pan 44, the drainage pipe 46, and the water sealing unit 47 and is led to the outside from the external drain port 45, the stored water 48 stored in the water sealing unit 47 is replaced with the drained water that has flowed through, and the replaced new stored water 48 is stored in the water sealing unit 47.

[0097] According to the air-conditioning system 20 according to the first embodiment described above, the following effects can be achieved.

[0098] (1) The air-conditioning system 20 includes an air-conditioning chamber 18 configured to be able to introduce air from the living room 2, an air conditioner 13 installed in the air-conditioning chamber 18 for temperature-adjusting the air in the air-conditioning chamber 18, a humidifying device 16 installed in the air-conditioning chamber 18 for humidifying the air temperature-adjusted by the air conditioner 13, a conveying fan 3 installed in the air-conditioning chamber 18 for conveying the temperature-adjusted and humidified air to the living room 2, and a drain pan 44 provided at the bottom of the humidifying device 16. A drain pipe 46 for leading the drain water from the humidifying device 16 to the outside is connected to the drain pan 44. A water-sealing part 47 is installed in the drain pipe 46 to suppress the inflow of outside air into the air-conditioning chamber 18 through the drain pipe 46 when the pressure inside the air-conditioning chamber 18 becomes reduced.

[0099] Thereby, when the air-conditioning system 20 conveys the air with the temperature and humidity adjusted in the air-conditioning chamber 18 to the living room 2, the water-sealing part 47 suppresses the inflow of outside air (for example, smelly and dirty air) from the drain pipe 46 of the humidifying device 16 into the air-conditioning chamber 18, so that the air in the living room 2 can be kept clean.

[0100] (2) The air-conditioning system 20 includes an air-conditioning control unit 52 of a system controller 14 for controlling the operation of the humidifying device 16. The air-conditioning control unit 52 of the system controller 14 controls to pass water through the water-sealing part 47 by periodically discharging the drain water of the humidifying device 16 and replace the stored water 48 stored in the water-sealing part 47. Thereby, the growth of mold or bacteria due to the deterioration of the water quality of the stored water 48 stored in the water-sealing part 47 is suppressed. As a result, when the pressure inside the air-conditioning chamber 18 becomes negative pressure, the inflow of mold or bacteria in the stored water 48 of the water-sealing part 47 into the air-conditioning chamber 18 is suppressed. That is, the air-conditioning system 20 can keep the air in the living room 2 clean.

[0101] (3) In the air conditioning system 20, the air conditioning control unit 52 of the system controller 14 determines whether it is in the cooling operation period or the heating operation period based on the operation mode information of the air conditioner 13. When it is identified as the cooling operation period, the replacement frequency of the stored water 48 in the water sealing part 47 is increased compared to when it is identified as the heating operation period. Thereby, in the cooling operation period when the water quality of the stored water 48 stored in the water sealing part 47 is likely to deteriorate, the growth of mold or bacteria can be more reliably suppressed. That is, the air conditioning system 20 can more effectively suppress the deterioration of the water quality of the stored water 48 in the water sealing part 47 (maintain the sanitary state of the water sealing part 47) based on the operation mode of the air conditioner 13.

[0102] As described above, the present invention has been described based on the embodiments. However, it is easily conceivable that the present invention is not limited to the above embodiments at all, and various improvements and modifications can be made without departing from the gist of the present invention. For example, the numerical values given in the above embodiments are examples, and it is natural to adopt other numerical values.

[0103] In the air conditioning system 20 according to the present invention, the liquid atomized in the humidifying device 16 may be other than water. For example, it may be a liquid such as hypochlorous acid water having bactericidal or deodorizing properties. Thereby, the air conditioning system 20 can include hypochlorous acid in the air blown into the living room 2, so that the disinfection or sterilization of the living room 2 can be easily performed. When using hypochlorous acid water, it is preferable to continuously operate the humidifying device 16 in order to disinfect or sterilize the living room 2 throughout the year.

[0104] Also, since the drainage discharged from the humidifying device 16 becomes hypochlorous acid water, the stored water 48 stored in the water sealing part 47 also becomes hypochlorous acid water. Therefore, the growth of mold or bacteria in the stored water 48 is more reliably suppressed by the hypochlorous acid contained in the hypochlorous acid water. That is, the air conditioning system 20 can more effectively suppress the deterioration of the water quality of the stored water 48 in the water sealing part 47 by the hypochlorous acid water used by the humidifying device 16.

[0105] In this embodiment, it is shown as a living room, but the living room does not necessarily need to be occupied by people and can be regarded as a single space. That is, if a corridor or a kitchen is separated to a certain extent, it can be regarded as a single space and corresponds to a single living room.

[0106] Moreover, the air-conditioning system 20 according to this embodiment is applicable to detached houses or multi-family houses such as condominiums. However, when applying the air-conditioning system 20 to a multi-family house, one system corresponds to each household, and each household is not regarded as a single living room.

Industrial Applicability

[0107] The air-conditioning system according to the present invention is useful as being capable of efficiently air-conditioning and controlling the air supplied to a plurality of spaces (living rooms) and the like.

Explanation of Signs

[0108] 1 Single-family house 2, 2a, 2b, 2c, 2d Living rooms 3, 3a, 3b Conveyor fans 4 Heat-exchanging fans 5, 5a, 5b Dampers 6, 6a, 6b, 6c, 6d Circulation ports 7, 7a, 7b, 7c, 7d Living room exhaust ports 8, 8a, 8b, 8c, 8d Living room air supply ports 11, 11a, 11b, 11c, 11d Living room temperature sensors 12, 12a, 12b, 12c, 12d Living room humidity sensors 13 Air conditioner 14 System controller 16 Humidifying device 17 Dust collection filter 18 Air-conditioning room 19 Input / output terminal 20 Air-conditioning system 31 Suction port 32 Air outlet 33 Liquid atomization chamber 34 Rotating motor 35 Rotating shaft 36 Centrifugal fan 37 Lift pipe 38 Rotating plate 39 Opening 40 Water storage part 40a Drain outlet 41 First eliminator 42 Second eliminator 43 Filter 44 Drain pan 45 External drain outlet 46 Drainage pipe 47 Water sealing part 47a Housing 47b Storage part 47c Partition board 48 Stored water 51 Living room target temperature and humidity acquisition part 52 Air conditioning control part 53 Air conditioner control part 54 Rotating motor control part 55 Air volume control part 56 Memory part 57 Temperature and humidity difference calculation part 58 Control condition determination part

Claims

1. An air conditioning unit configured to introduce air from an air-conditioned space, An air conditioner installed in the air conditioning unit for temperature control of the air in the air conditioning unit, A humidifying device installed in the air conditioning unit for humidifying the air temperature-controlled by the air conditioner, A blower installed in the air conditioning unit for conveying the temperature-controlled and humidified air to the air-conditioned space, A water receiving part provided at the bottom of the humidifying device, A control part for controlling the operation of the humidifying device, Comprising, A drain pipe for leading the drain from the humidifying device to the outside is connected to the water receiving part, A water sealing part for suppressing the inflow of outside air into the air conditioning unit through the drain pipe when the inside of the air conditioning unit is depressurized is installed in the drain pipe, The control part controls to pass water through the drain pipe by periodically discharging the drain of the humidifying device to replace the stored water stored in the water sealing part, The control part specifies a cooling operation period or a heating operation period based on the operation mode of the air conditioner, and when specified as the cooling operation period, increases the replacement frequency of the stored water in the water sealing part compared to when specified as the heating operation period. An air conditioning system characterized by that.

2. The air conditioning system according to claim 1, wherein the drain from the humidifying device is electrolyzed water.

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